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Bronze Broc4-3

Bronze BrMcO7-3 Bronze БрОФ2-0,25 Bronze БрОФ4-0,25 Bronze БрОФ6,5-0,15 Bronze БрОФ6,5-0,4 Bronze БрОФ7-0,2 Bronze БрОФ8-0,3 Bronze БрОЦ4-3 Bronze БрОЦС4-4-2,5 Bronze БрОЦС4-4-4 Bronze БрХ0,3О0,3Цр0,1 (БрХОЦр0,3-0,3-0,1)

Designation

Name The value
Designation GOST Cyrillic БрОЦ4-3
Designation GOST Latin BpOTs4-3
Transliteration BrOTs4-3
The chemical elements BaSnZn4-3

Description

Bronze Broc4−3 is used: for the manufacture of semi-finished wires, ribbons, strips, rods, used in electrical and mechanical engineering; current-carrying springs, contacts, plug connectors, parts of chemical equipment; round welding wire and welding rods round drawn and extruded with a diameter of from 1.2 to 8.0 mm, designed for manual welding in shielding gases of copper and mechanized submerged arc welding of copper and brass; round welding wire and welding rods round drawn and extruded with a diameter of 1.4 to 4.0 mm, designed for manual welding in shielding gases of tin-phosphor bronze and tin bronze.

Standards

Name Code Standards
Welding and cutting of metals. Soldering, riveting В05 GOST 16130-90
Sheets and stripes В53 GOST 1761-92, TU 48-21-180-90
Non-ferrous metals, including rare metals, and their alloys В51 GOST 28873-90, GOST 5017-2006, OST 4.021.009-92
Bars В55 OST 4.021.023-92
Tapes В54 OST 4.021.083-92, TU 48-21-184-90
Wire of non-ferrous metals and their alloys В74 OST 4.021.107-92, TU 48-21-871-89

Chemical composition

Standard S P Si Ni Fe Cu Al Zn Sn Sb Pb Bi Mg
GOST 5017-2006 ≤0.007 ≤0.03 ≤0.005 ≤0.3 ≤0.05 The rest ≤0.002 2.7-3.3 3.5-4 ≤0.002 ≤0.02 ≤0.002 ≤0.007
GOST 16130-90 ≤0.007 ≤0.03 ≤0.005 ≤0.3 ≤0.05 The rest ≤0.002 2.7-3.3 3.5-4 ≤0.002 ≤0.02 ≤0.002 ≤0.007
Cu is the basis.
According to GOST 5017-2006, the total content of other impurities (not specified in the chemical composition) should be ≤ 0,20%. In bronze, the mass fraction of titanium is not more than 0.12% due to the mass fraction of copper, which is not taken into account in the total amount of other impurities.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % d10
Strip and cold rolled strip according to GOST 1761-92, OST 4.021.083-92 in the state of delivery
≥0.5 ≥110 ≥290 - ≥38
0.5 ≥110 ≥290 - ≥35
≥670 ≥690 - -
≥0.5 290-510 350-540 - ≥8
0.5 290-510 350-540 - ≥4
≥0.5 510-670 540-690 - ≥4
0.5 510-670 540-690 - ≥2
Cold-drawn wire for the manufacture of elastic elements in the delivery state (solid) OST 4.021.107-92 (longitudinal samples)
0.12-2.5 - ≥882.9 - ≥0.5
2.5-4 - ≥833.8 - ≥1
4-8 - ≥814.2 - ≥1
8-10 - ≥765.2 - ≥2
The pressed bars in the state of delivery according to GOST 6511-60 (samples prodolny)
42-120 - ≥270 ≥35 ≥25
Bars, drawn, in the state of delivery according to GOST 6511-60, OST 4.021.023-92 (longitudinal samples)
13-25 - ≥370 ≥18 ≥12
26-35 - ≥330 ≥20 ≥14
36-40 - ≥310 ≥20 ≥16
5-12 - ≥430 ≥12 ≥10

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d5 Elongation after rupture
d10 Elongation after rupture

Physical characteristics

Temperature Е, ГПа r, кг/м3 l, Вт/(м · °С) R, НОм · м
20 124 8800 84 90

A description of the physical symbols

Name Description
Е The normal elasticity modulus
r Density
l Coefficient of thermal conductivity
R UD. the resistivity

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